Segment Information - Schedule of Reportable Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues from Operations
Revenues from operations	$ 6,882	$ 7,059	$ 13,418	$ 15,677
Operating Income
Total operating income	616	184	556	844
Interest expense, net	(3)	(4)	(6)	(4)
Loss on equity investment in unconsolidated subsidiary	(676)	(100)	(752)	(139)
Other income (expense), net	70	232	242	(152)
Total other (expense) income, net	(609)	128	(516)	(295)
INCOME BEFORE INCOME TAXES	7	312	40	549
Unallocated corporate expense [Member]
Operating Income
Total operating income	(320)	(167)	(745)	(415)
Electronic components [Member]
Revenues from Operations
Revenues from operations	6,407	6,769	12,661	15,045
Electronic components [Member] | Reportable Segment [Member]
Operating Income
Total operating income	834	314	1,183	1,185
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	475	290	757	632
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income
Total operating income	$ 102	$ 37	$ 118	$ 74